drivers/scsi: Remove unnecessary casts of private_data

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index cad6f9a..aa40036 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -770,7 +770,7 @@
 {
 	if (!capable(CAP_SYS_RAWIO))
 		return -EPERM;
-	return aac_compat_do_ioctl((struct aac_dev *)file->private_data, cmd, arg);
+	return aac_compat_do_ioctl(file->private_data, cmd, arg);
 }
 #endif